Identify whether the series summation of 15 open parentheses 4 close parentheses to the i minus 1 power from 1 to infinity is a convergent or divergent geometric series and find the sum, if possible.

this is a convergent geometric series. the sum is –5.

this is a divergent geometric series. the sum is –5.

this is a convergent geometric series. the sum cannot be found.

this is a divergent geometric series. the sum cannot be found.